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參數(shù)資料
| 型號(hào)： | AD6122 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | CDMA 3 V Receiver IF Subsystem with Integrated Voltage Regulator(低功耗接收中頻子系統(tǒng)) |
| 中文描述： | CDMA的3 V接收機(jī)中頻子系統(tǒng)集成穩(wěn)壓器（低功耗接收中頻子系統(tǒng)） |
| 文件頁數(shù)： | 4/19頁 |
| 文件大?。?/td> | 262K |
| 代理商： | AD6122 |
REV. 0
AD6122
–4–
PIN FUNCTION DESCRIPTIONS
Pin #
Pin Label
Description
Function
1
PD1
Power-Down 1
IF Amplifier Power-Down Control Input; CMOS Com-
patible; HIGH = Entire IC Powers Down, LOW = IF
Amplifiers On.
Modulator Power-Down Control Input; CMOS Compat-
ible; HIGH = Modulator Off , LOW = Modulator On.
Connects to Emitter of External PNP Pass Transistor
and VCC.
Connects to Base of External PNP Pass Transistor.
2
PD2
Power-Down 2
3
LDOE
Low Dropout Regulator Pass
Transistor Emitter Connection
Low Dropout Regulator Pass
Transistor Base
Low Dropout Regulator Pass
Transistor Collector
Low Dropout Regulator Ground
Digital Ground
Local Oscillator “Positive” Input
Local Oscillator “Negative” Input
Digital VCC
Transmit Output “Positive”
Transmit Output “Negative”
Transmit Output VCC
IF Ground
IF Input “Negative”
IF Input “Positive”
Modulator “Negative” If Output
Modulator “Positive” Output
Q Input “Positive”
Q Input “Negative”
Modulator Common-Mode
Reference Out
I Input “Negative”
I Input “Positive”
Ground
IF VCC
Gain Control Reference Output
4
LDOB
5
LDOC
Connects to Collector of External PNP Pass Transistor.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
LDOGND
DGND
LOIPP
LOIPN
DVCC
TXOPP
TXOPN
TXVCC
IFGND
IFINN
IFINP
MODOPN
MODOPP
QIPP
QIPN
MODCMREF
Ground.
Ground.
Connects to Local Oscillator; AC Coupled.
Connects to Ground via Decoupling Capacitor.
Connects to Digital Supply.
Connects to Output Filter; AC Coupled.
Connects to Output Filter; AC Coupled.
Connects to LDO Output via Decoupling Network.
Ground.
IF “Negative” Input from LC Roofing Filter.
IF “Positive” Input from LC Roofing Filter.
Output Modulator Output to LC Roofing Filter.
Modulator Output to LC Roofing Filter.
Connects to Q “Positive” Output of Baseband IC.
Connects to Q “Negative” Output of Baseband IC.
Connects to CDMA Baseband Converter Tx DAC
Common-Mode Reference Input.
Connects to I “Negative” Output of Baseband IC.
Connects to I “Positive” Output of Baseband IC.
Connects to IF Ground.
Connects to Decoupled Output of LDO Regulator.
Provides 1.23 V Voltage Reference Output for DAC in
CDMA Baseband Converter and REFIN (Pin 27).
Accepts 1.23 V Reference Input from REFOUT (Pin 17)
or External Reference.
Accepts Gain Control Input Voltage from External DAC.
Max Gain = 2.5 V; Min Gain = 0.5 V.
22
23
24
25
26
IIPN
IIPP
IFGND
IFVCC
REFOUT
27
REFIN
Gain Control Reference Input
28
VGAIN
Gain Control Voltage Input
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